Electrochemistry Application — Copper-doped strontium metal-organic framework: Dual-function active material for supercapacitor and oxygen evolution reaction

16 measurement groups · 50 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

two-electrode asymmetric supercapacitor CV, GCD, Ragone, EIS and cycling

Impedance spectroscopy Voltammetry Galvanostatic cycling

Cu-doped Sr MOF//AC ASC device · Electrode

Cu-doped Sr MOF//AC ASC in 3 M KOH, working voltage window 1.6 V; CV 10-100 mV s-1; GCD at multiple current densities.

Atmosphere: 3 M KOH aqueous electrolyte
Geometry: asymmetric two-electrode device
Context: device composite using Cu-doped Sr MOF positive electrode
Measurement source: 10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ASC Coulombic efficiency after cyclingMarked as a best value within this paper	99.3 %	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 7f
ASC capacitance retention after 5000 GCD cyclesMarked as a best value within this paper	98.9 %	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 7f
ASC energy density at 801 W kg-1Marked as a best value within this paper	19 Wh kg-1 at 801 W kg-1	—	—	Text Rounded Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 7d
ASC high-power density pointMarked as a best value within this paper	4013 W kg-1 at 13.6 Wh kg-1	—	—	Text Rounded Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 7d
ASC power density at 19 Wh kg-1	801 W kg-1	—	—	Text Rounded Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 7d
ASC high-rate capability	71.4 %	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 7c
ASC charge-transfer resistance RctMarked as a best value within this paper	0.53 ohm	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 7e
ASC solution/internal resistance Rs	2.3 ohm	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 7e
ASC highest specific capacitanceMarked as a best value within this paper	213.5 F g-1 at 1 A g-1	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 7c
ASC working voltage window	1.6 V	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 7a

double-layer capacitance and ECSA from non-faradaic CV

Voltammetry

Cu-doped Sr MOF OER glassy-carbon electrode · Electrode

CV scan rates 10-100 mV s-1 in non-faradaic potential range 1.09-1.19 V; Cs assumed 0.04 mF cm-2.

Atmosphere: 1 M KOH aqueous electrolyte
Geometry: glassy carbon working electrode
Context: Cu-doped Sr MOF compared with undoped Sr MOF
Measurement source: 3 · 2.4 Electrochemical analysis · Fig. S3 and Fig. 8c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu-doped Sr MOF double-layer capacitance CdlMarked as a best value within this paper	21.95 mF cm-2	—	—	Text Exact Reported	11 · 3.3 Electrochemical OER Activity · Fig. 8c
Cu-doped Sr MOF electrochemically active surface areaMarked as a best value within this paper	548.75 cm2	—	—	Text Exact Reported	11 · 3.3 Electrochemical OER Activity · Fig. 8d

double-layer capacitance and ECSA from non-faradaic CV

Voltammetry

Undoped Sr MOF OER glassy-carbon electrode · Electrode

CV scan rates 10-100 mV s-1 in non-faradaic potential range 1.09-1.19 V for undoped Sr MOF; Cs assumed 0.04 mF cm-2.

Atmosphere: 1 M KOH aqueous electrolyte
Geometry: glassy carbon working electrode
Context: Undoped Sr MOF OER pristine-control electrode compared with Cu-doped Sr MOF
Measurement source: 3 · Supporting information · Figure S3a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Undoped Sr MOF double-layer capacitance Cdl	6.61 mF cm-2	—	—	Text Exact Reported	11 · 3.3 Electrochemical OER Activity · Fig. 8c
Undoped Sr MOF electrochemically active surface area	165.25 cm2	—	—	Text Exact Reported	11 · 3.3 Electrochemical OER Activity · Fig. 8d

OER EIS and chronopotentiometric stability

Impedance spectroscopy Galvanostatic cycling

Cu-doped Sr MOF OER glassy-carbon electrode · Electrode

EIS at 10 mV amplitude from 100 kHz to 0.01 Hz; chronopotentiometry at j = 10 mA cm-2 for 12 h; 2000-cycle LSV stability check in SI.

Atmosphere: 1 M KOH aqueous electrolyte
Geometry: glassy carbon working electrode
Context: Cu-doped Sr MOF compared with undoped Sr MOF
Measurement source: 11 · 3.3 Electrochemical OER Activity · Fig. 8d and Fig. 9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu-doped Sr MOF 12 h chronopotentiometry potential decreaseMarked as a best value within this paper	0.3 %	—	—	Text Exact Reported	11 · 3.3 Electrochemical OER Activity · Fig. 9b
OER EIS interfacial electron-transfer comparisonMarked as a best value within this paper	Cu-doped Sr MOF showed a smaller semicircle than undoped Sr MOF	—	—	Text Qualitative	11 · 3.3 Electrochemical OER Activity · Fig. 8d

OER EIS and chronopotentiometric stability

Impedance spectroscopy Galvanostatic cycling

Undoped Sr MOF OER glassy-carbon electrode · Electrode

EIS at 10 mV amplitude from 100 kHz to 0.01 Hz; undoped Sr MOF chronopotentiometry at j = 10 mA cm-2 for 12 h.

Atmosphere: 1 M KOH aqueous electrolyte
Geometry: glassy carbon working electrode
Context: Undoped Sr MOF OER pristine-control electrode compared with Cu-doped Sr MOF
Measurement source: 11 · 3.3 Electrochemical OER Activity · Fig. 8d and Fig. 9a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Undoped Sr MOF 12 h chronopotentiometry potential decrease	1.2 %	—	—	Text Exact Reported	11 · 3.3 Electrochemical OER Activity · Fig. 9a

LSV durability comparison before and after cycling

Voltammetry

Cu-doped Sr MOF OER glassy-carbon electrode · Electrode

OER LSV curves before and after 2000 cycles of a stability test; blue initial curve and red dotted post-cycling curve.

Atmosphere: 1 M KOH aqueous electrolyte
Geometry: glassy carbon working electrode
Context: Cu-doped Sr MOF OER electrode durability check
Measurement source: 4 · Supporting information · Figure S4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER LSV stability after 2000 cycles	initial and after-2000-cycles LSV curves nearly overlap	—	—	Visual Estimate Qualitative	4 · Supporting information · Figure S4

OER linear sweep voltammetry and Tafel analysis

Voltammetry Tafel and polarisation analysis

Cu-doped Sr MOF OER glassy-carbon electrode · Electrode

1 M KOH, scan rate 5 mV s-1, iR-corrected; overpotential at 10 mA cm-2 and Tafel slope compared with undoped Sr MOF.

Atmosphere: 1 M KOH aqueous electrolyte
Geometry: glassy carbon working electrode
Context: Cu-doped Sr MOF OER electrode compared with undoped Sr MOF
Measurement source: 10 · 3.3 Electrochemical OER Activity · Fig. 8a-b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu-doped Sr MOF OER overpotential at 10 mA cm-2Marked as a best value within this paper	398 mV	—	—	Text Rounded Reported	10 · 3.3 Electrochemical OER Activity · Fig. 8a
Cu-doped Sr MOF Tafel slopeMarked as a best value within this paper	58 mV dec-1	—	—	Text Rounded Reported	10 · 3.3 Electrochemical OER Activity · Fig. 8b

OER linear sweep voltammetry and Tafel analysis

Voltammetry Tafel and polarisation analysis

Undoped Sr MOF OER glassy-carbon electrode · Electrode

1 M KOH, scan rate 5 mV s-1, iR-corrected; undoped Sr MOF overpotential at 10 mA cm-2 and Tafel slope.

Atmosphere: 1 M KOH aqueous electrolyte
Geometry: glassy carbon working electrode
Context: Undoped Sr MOF OER pristine-control electrode compared with Cu-doped Sr MOF
Measurement source: 10 · 3.3 Electrochemical OER Activity · Fig. 8a-b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Undoped Sr MOF OER overpotential at 10 mA cm-2	600 mV	—	—	Text Rounded Reported	10 · 3.3 Electrochemical OER Activity · Fig. 8a
Undoped Sr MOF Tafel slope	181 mV dec-1	—	—	Text Rounded Reported	10 · 3.3 Electrochemical OER Activity · Fig. 8b

cyclic voltammetry and Dunn capacitive/diffusion analysis

Voltammetry

Cu-doped Sr MOF/Ni foam supercapacitor electrode · Electrode

Three-electrode setup in 3 M KOH; Ag/AgCl reference, Pt counter; CV from -0.1 to 0.45 V, scan rates 5-100 mV s-1.

Atmosphere: 3 M KOH aqueous electrolyte
Geometry: Ni foam working electrode
Context: Cu-doped Sr MOF electrode compared with undoped Sr MOF electrode and bare Ni foam
Measurement source: 7 · 3.2 Electrochemical performance for supercapacitor application · Fig. 5

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu-doped Sr MOF capacitive contribution at 100 mV s-1	65.7 %	—	—	Text Exact Reported	8 · 3.2 Electrochemical performance for supercapacitor application · Fig. 5e-f
Cu-doped Sr MOF diffusion-controlled contribution at 40 mV s-1Marked as a best value within this paper	53.8 %	—	—	Text Exact Reported	8 · 3.2 Electrochemical performance for supercapacitor application · Fig. 5e-f

cyclic voltammetry and Dunn capacitive/diffusion analysis

Voltammetry

Undoped Sr MOF/Ni foam supercapacitor electrode · Electrode

Three-electrode setup in 3 M KOH; undoped Sr MOF/Ni foam electrode CV at scan rates 5-100 mV s-1, with Dunn capacitive/diffusion contribution analysis.

Atmosphere: 3 M KOH aqueous electrolyte
Geometry: Ni foam working electrode
Context: Undoped Sr MOF electrode pristine-control comparison to Cu-doped Sr MOF electrode
Measurement source: 2 · Supporting information · Figure S2a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Undoped Sr MOF capacitive contribution at 100 mV s-1Marked as a best value within this paper	86.3 %	—	—	Text Exact Reported	8 · 3.2 Electrochemical performance for supercapacitor application · Fig. 5e-f
Undoped Sr MOF diffusion-controlled contribution at 40 mV s-1	27.2 %	—	—	Text Exact Reported	8 · 3.2 Electrochemical performance for supercapacitor application · Fig. 5e-f
Undoped Sr MOF CV positive peak current density at 100 mV s-1	~13 A g-1 positive peak current density	—	—	Figure Axis Approximate	2 · Supporting information · Figure S2a

long-term GCD cycling stability

Galvanostatic cycling

Cu-doped Sr MOF/Ni foam supercapacitor electrode · Electrode

Continuous GCD at 3 A g-1 for 10,000 cycles.

Atmosphere: 3 M KOH aqueous electrolyte
Geometry: Ni foam working electrode
Context: Cu-doped Sr MOF electrode compared with undoped Sr MOF electrode
Measurement source: 10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu-doped Sr MOF capacity retention after 10,000 cyclesMarked as a best value within this paper	98.7 %	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6f

long-term GCD cycling stability

Galvanostatic cycling

Undoped Sr MOF/Ni foam supercapacitor electrode · Electrode

Continuous GCD cycling at 3 A g-1 for 10,000 cycles for undoped Sr MOF control electrode.

Atmosphere: 3 M KOH aqueous electrolyte
Geometry: Ni foam working electrode
Context: Undoped Sr MOF pristine-control electrode compared with Cu-doped Sr MOF electrode
Measurement source: 10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Undoped Sr MOF capacity retention after 10,000 cycles	95.9 %	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6f

electrochemical impedance spectroscopy (EIS) and K+ diffusion coefficient calculation

Impedance spectroscopy

Cu-doped Sr MOF/Ni foam supercapacitor electrode · Electrode

Nyquist plots and low-frequency Warburg analysis for undoped Sr MOF and Cu-doped Sr MOF electrodes.

Atmosphere: 3 M KOH aqueous electrolyte
Geometry: Ni foam working electrode
Context: Cu-doped Sr MOF electrode compared with undoped Sr MOF electrode
Measurement source: 9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6d-e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu-doped Sr MOF K+ diffusion coefficientMarked as a best value within this paper	10.9 x 10-12 cm2 s-1	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6e
Cu-doped Sr MOF charge-transfer resistanceMarked as a best value within this paper	8.8 ohm	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6d

electrochemical impedance spectroscopy (EIS) and K+ diffusion coefficient calculation

Impedance spectroscopy

Undoped Sr MOF/Ni foam supercapacitor electrode · Electrode

Nyquist plot and low-frequency Warburg analysis for the undoped Sr MOF electrode in 3 M KOH.

Atmosphere: 3 M KOH aqueous electrolyte
Geometry: Ni foam working electrode
Context: Undoped Sr MOF pristine-control electrode compared with Cu-doped Sr MOF electrode
Measurement source: 9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6d-e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Undoped Sr MOF K+ diffusion coefficient	2.30 x 10-12 cm2 s-1	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6e
Undoped Sr MOF charge-transfer resistance	11.6 ohm	—	—	Text Exact Reported	10 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6d

galvanostatic charge-discharge (GCD)

Galvanostatic cycling

Cu-doped Sr MOF/Ni foam supercapacitor electrode · Electrode

Three-electrode GCD in 3 M KOH; potential window -0.10 to 0.45 V; current densities 1-8 A g-1.

Atmosphere: 3 M KOH aqueous electrolyte
Geometry: Ni foam working electrode
Context: Cu-doped Sr MOF electrode compared with undoped Sr MOF electrode
Measurement source: 8 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6a-c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu-doped Sr MOF specific capacitance at 1 A g-1Marked as a best value within this paper	443 F g-1	—	—	Text Rounded Reported	8 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6a
Cu-doped Sr MOF specific capacity at 1 A g-1Marked as a best value within this paper	243.6 C g-1	—	—	Text Exact Reported	8 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6a
Cu-doped Sr MOF specific capacity at 2 A g-1Marked as a best value within this paper	215.2 C g-1	—	—	Text Exact Reported	9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6c
Cu-doped Sr MOF specific capacity at 3 A g-1Marked as a best value within this paper	193.2 C g-1	—	—	Text Exact Reported	9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6c
Cu-doped Sr MOF specific capacity at 4 A g-1Marked as a best value within this paper	183.2 C g-1	—	—	Text Exact Reported	9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6c
Cu-doped Sr MOF specific capacity at 5 A g-1Marked as a best value within this paper	180.5 C g-1	—	—	Text Exact Reported	9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6c
Cu-doped Sr MOF specific capacity at 8 A g-1Marked as a best value within this paper	170.3 C g-1	—	—	Text Exact Reported	9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6c
Cu-doped Sr MOF rate capabilityMarked as a best value within this paper	70.0 %	—	—	Text Exact Reported	9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6c

galvanostatic charge-discharge (GCD)

Galvanostatic cycling

Undoped Sr MOF/Ni foam supercapacitor electrode · Electrode

Three-electrode GCD in 3 M KOH; undoped Sr MOF/Ni foam electrode, potential window -0.10 to 0.45 V; current densities 1-8 A g-1.

Atmosphere: 3 M KOH aqueous electrolyte
Geometry: Ni foam working electrode
Context: Undoped Sr MOF electrode pristine-control comparison to Cu-doped Sr MOF electrode
Measurement source: 2 · Supporting information · Figure S2b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Undoped Sr MOF specific capacitance at 1 A g-1	147.8 F g-1	—	—	Text Exact Reported	8 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6a
Undoped Sr MOF specific capacity at 1 A g-1	81.3 C g-1	—	—	Text Exact Reported	8 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6a
Undoped Sr MOF specific capacity at 2 A g-1	74.6 C g-1	—	—	Text Exact Reported	9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6c
Undoped Sr MOF specific capacity at 3 A g-1	65.7 C g-1	—	—	Text Exact Reported	9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6c
Undoped Sr MOF specific capacity at 4 A g-1	56.1 C g-1	—	—	Text Exact Reported	9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6c
Undoped Sr MOF specific capacity at 5 A g-1	41.0 C g-1	—	—	Text Exact Reported	9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6c
Undoped Sr MOF specific capacity at 8 A g-1	29.6 C g-1	—	—	Text Exact Reported	9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6c
Undoped Sr MOF rate capability	36.4 %	—	—	Text Exact Reported	9 · 3.2 Electrochemical performance for supercapacitor application · Fig. 6c
Undoped Sr MOF approximate discharge time at 1 A g-1	~85 s discharge segment at 1 A g-1	—	—	Figure Axis Approximate	2 · Supporting information · Figure S2b